/* +------------------------------------------------------------------------+
   |                     Mobile Robot Programming Toolkit (MRPT)            |
   |                          http://www.mrpt.org/                          |
   |                                                                        |
   | Copyright (c) 2005-2019, Individual contributors, see AUTHORS file     |
   | See: http://www.mrpt.org/Authors - All rights reserved.                |
   | Released under BSD License. See details in http://www.mrpt.org/License |
   +------------------------------------------------------------------------+ */

/* WARNING: this file should *not* be used by applications. It is
   part of the implementation of the compression library and is
   subject to change. Applications should only use zlib.h.
 */

/* @(#) $Id: zutil.h 35458 2005-09-10 21:15:17Z MW $ */

#ifndef ZUTIL_H  // do NOT remove this guard define
#define ZUTIL_H

#define ZLIB_INTERNAL
#include "zlib.h"

#ifdef STDC
#ifndef _WIN32_WCE
#include <stddef.h>
#endif
#include <string.h>
#include <stdlib.h>
#endif
#ifdef NO_ERRNO_H
#ifdef _WIN32_WCE
/* The Microsoft C Run-Time Library for Windows CE doesn't have
 * errno.  We define it as a global variable to simplify porting.
 * Its value is always 0 and should not be used.  We rename it to
 * avoid conflict with other libraries that use the same workaround.
 */
#define errno z_errno
#endif
extern int errno;
#else
#ifndef _WIN32_WCE
#include <errno.h>
#endif
#endif

#ifndef local
#define local static
#endif
/* compile with -Dlocal if your debugger can't find static symbols */

typedef unsigned char uch;
typedef uch FAR uchf;
typedef unsigned short ush;
typedef ush FAR ushf;
typedef unsigned long ulg;

extern const char* const z_errmsg[10]; /* indexed by 2-zlib_error */
/* (size given to avoid silly warnings with Visual C++) */

#define ERR_MSG(err) z_errmsg[Z_NEED_DICT - (err)]

#define ERR_RETURN(strm, err) return (strm->msg = (char*)ERR_MSG(err), (err))
/* To be used only when the state is known to be valid */

/* common constants */

#ifndef DEF_WBITS
#define DEF_WBITS MAX_WBITS
#endif
/* default windowBits for decompression. MAX_WBITS is for compression only */

#if MAX_MEM_LEVEL >= 8
#define DEF_MEM_LEVEL 8
#else
#define DEF_MEM_LEVEL MAX_MEM_LEVEL
#endif
/* default memLevel */

#define STORED_BLOCK 0
#define STATIC_TREES 1
#define DYN_TREES 2
/* The three kinds of block type */

#define MIN_MATCH 3
#define MAX_MATCH 258
/* The minimum and maximum match lengths */

#define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */

/* target dependencies */

#if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
#define OS_CODE 0x00
#if defined(__TURBOC__)
#if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
/* Allow compilation with ANSI keywords only enabled */
void _Cdecl farfree(void* block);
void* _Cdecl farmalloc(unsigned long nbytes);
#else
#include <alloc.h>
#endif
#else /* MSC or DJGPP */
#include <malloc.h>
#endif
#endif

#ifdef AMIGA
#define OS_CODE 0x01
#endif

#if defined(VAXC) || defined(VMS)
#define OS_CODE 0x02
#define F_OPEN(name, mode) \
	fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
#endif

#if defined(ATARI) || defined(atarist)
#define OS_CODE 0x05
#endif

#ifdef OS2
#define OS_CODE 0x06
#ifdef M_I86
#include <malloc.h>
#endif
#endif

#if defined(MACOS) || defined(TARGET_OS_MAC)
#define OS_CODE 0x07
#if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
#include <unix.h> /* for fdopen */
#else
#ifndef fdopen
#define fdopen(fd, mode) nullptr /* No fdopen() */
#endif
#endif
#endif

#ifdef TOPS20
#define OS_CODE 0x0a
#endif

#ifdef WIN32
#ifndef __CYGWIN__ /* Cygwin is Unix, not Win32 */
#define OS_CODE 0x0b
#endif
#endif

#ifdef __50SERIES /* Prime/PRIMOS */
#define OS_CODE 0x0f
#endif

#if defined(_BEOS_) || defined(RISCOS)
#define fdopen(fd, mode) nullptr /* No fdopen() */
#endif

#if (defined(_MSC_VER) && (_MSC_VER > 600))
#if defined(_WIN32_WCE)
#define fdopen(fd, mode) nullptr /* No fdopen() */
#ifndef _PTRDIFF_T_DEFINED
typedef int ptrdiff_t;
#define _PTRDIFF_T_DEFINED
#endif
#else
#define fdopen(fd, type) _fdopen(fd, type)
#endif
#endif

/* common defaults */

#ifndef OS_CODE
#define OS_CODE 0x03 /* assume Unix */
#endif

#ifndef F_OPEN
#define F_OPEN(name, mode) fopen((name), (mode))
#endif

/* functions */

#if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550)
#ifndef HAVE_VSNPRINTF
#define HAVE_VSNPRINTF
#endif
#endif
#if defined(__CYGWIN__)
#ifndef HAVE_VSNPRINTF
#define HAVE_VSNPRINTF
#endif
#endif
#ifndef HAVE_VSNPRINTF
#ifdef MSDOS
/* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
   but for now we just assume it doesn't. */
#define NO_vsnprintf
#endif
#ifdef __TURBOC__
#define NO_vsnprintf
#endif
#ifdef WIN32
/* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
#if !defined(vsnprintf) && !defined(NO_vsnprintf)
#define vsnprintf _vsnprintf
#endif
#endif
#ifdef __SASC
#define NO_vsnprintf
#endif
#endif
#ifdef VMS
#define NO_vsnprintf
#endif

#if defined(pyr)
#define NO_MEMCPY
#endif
#if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
/* Use our own functions for small and medium model with MSC <= 5.0.
 * You may have to use the same strategy for Borland C (untested).
 * The __SC__ check is for Symantec.
 */
#define NO_MEMCPY
#endif
#if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
#define HAVE_MEMCPY
#endif
#ifdef HAVE_MEMCPY
#ifdef SMALL_MEDIUM /* MSDOS small or medium model */
#define zmemcpy _fmemcpy
#define zmemcmp _fmemcmp
#define zmemzero(dest, len) _fmemset(dest, 0, len)
#else
#define zmemcpy memcpy
#define zmemcmp memcmp
#define zmemzero(dest, len) memset(dest, 0, len)
#endif
#else
extern void zmemcpy OF((Bytef * dest, const Bytef* source, uInt len));
extern int zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len));
extern void zmemzero OF((Bytef * dest, uInt len));
#endif

/* Diagnostic functions */
#ifdef DEBUG
#include <stdio.h>
extern int z_verbose;
extern void z_error OF((char* m));
#define Assert(cond, msg)          \
	{                              \
		if (!(cond)) z_error(msg); \
	}
#define Trace(x)                       \
	{                                  \
		if (z_verbose >= 0) fprintf x; \
	}
#define Tracev(x)                     \
	{                                 \
		if (z_verbose > 0) fprintf x; \
	}
#define Tracevv(x)                    \
	{                                 \
		if (z_verbose > 1) fprintf x; \
	}
#define Tracec(c, x)                         \
	{                                        \
		if (z_verbose > 0 && (c)) fprintf x; \
	}
#define Tracecv(c, x)                        \
	{                                        \
		if (z_verbose > 1 && (c)) fprintf x; \
	}
#else
#define Assert(cond, msg)
#define Trace(x)
#define Tracev(x)
#define Tracevv(x)
#define Tracec(c, x)
#define Tracecv(c, x)
#endif

voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
void zcfree OF((voidpf opaque, voidpf ptr));

#define ZALLOC(strm, items, size) \
	(*((strm)->zalloc))((strm)->opaque, (items), (size))
#define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
#define TRY_FREE(s, p)      \
	{                       \
		if (p) ZFREE(s, p); \
	}

#endif
